Slow Datapump Import For Statement With Insert or Delete Showing NESTED_TABLE_ID

(Doc ID 2358417.1)

Last updated on FEBRUARY 19, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 to 12.2.0.1 [Release 11.2 to 12.2]
Information in this document applies to any platform.

Symptoms

Slow performance is observed during DataPump Import.

Tkprof output generated for 10046 DW trace shows "NESTED_TABLE_ID" being used as part of an insert statement which consumes significant time:

INSERT /*+ NO_PARTIAL_COMMIT REF_CASCADE_CURSOR */ INTO  "TTBG"."SYS_NTUgTX6FIvjSHgUwpq+pECTA==" ("NESTED_TABLE_ID", "SYS_NC_ARRAY_INDEX$","SYS_NC_ROWINFO$") VALUES (:1,:2,:3)

Changes

 

Cause

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